Permutation-padlock.



G. J. EVANS.

PERMUTATION PADLOCK. APPLIUATION FILED 00117, 1910.

41,021,456.- Patnted Mar. 246, 191.2.`

2 SHEETS-SHEET 1.

. C.. J. EVANS.

PBRMUTATION PADLOUK.

APPLIoAmoN FILED ouT.17, 1910.

1O21,456. Y 'Patelnted Mar. 26, 1912. Y

2 SHEETS-SHEET 2.

0LUMIIA PLANmlAPh co.; WASHINGTON. D. CY

CHARLES J'. EVANS, 0F WICHITA, KANSAS.

PERMUTATION-PADLOCK.

Specification o'f Letters Patent.

Application filed October 17, 1910.

Serial No. 587,539.

ToaZZ whom t may concern:

Be it known that I, CHARLES J. EVANS, citizen of the United States,residing at Wichita, in the county of Sedgwick and State of Kansas, haveinvented certain new and useful Improvements in Permutation- Padlocks,of which the following is a specification.

My invention relates to locks and particularly to permutation padlocks.

The primary object of my invention is to provide a keyless permutationlock of a very simple and effective `construction having a shackleformed of two members pivoted to each other and arranged tof'be insertedthrough a plurality of tumblers and interlocked'therewith, the legs ofthe shackle being provided with interlocking teeth preventing theremoval of one part of the shackle by the removal of the pivot therewithand holding the two parts of the shackle in rigid engagement with eachother when inserted in place within the tumblers.

A further object is to provide, in connection with a shackle havingpivoted legs,v a tubular pintle through which the shackle is passed, anda series of rotatable tumblers mounted on the tubular pintle, of meansfor preventing any removal of the tumblers from the pintle while theshackle is in place.

My invention is illustrated in the accompanying drawings wherein:

Figure l is a perspective v'iew of my padlock with the shackle locked inplace. Fig. 2 is an venlarged vertical section of the body portion ofthe padlock, the shackle being shown in elevation and in place. Fig. 3is a top plan view of one of the locking disks, the tubularpintle andthe shackle being shown in section. Fig. 4 is a like view to Fig. 3 butshowing the locking disk so turned as to prevent the withdrawal of theshackle. Fig. 5 is a perspective view of one of the locking disks. Fig.`6 is a transverse section of the` same. Fig. 7 is a perspective view oft-he tubular pintle, the uppermost of the locking disks being shown indotted lines. @Fig 8 is a side elevation of the shackle detached fromthe body and opened.

Referring to Fig. 2fit will be seen that the shackle of the padlock ismade in two parts or legs hinged to each other like the legs of acompass so that the legs may open out or be closed together. Preferablythe shackle has the form shown in Fig. 8,

each leg comprising a bowed portion 2, a straight shank 8, the bowedportion of the shackle forming the usual loop or bow l of the lock. Theupper ends of the bowed portions of the legs are hinged to each other bymeans of a pivot 4. The straight Shanks Patented Mar. 26, 1912.

3 are each semicylindrical in section and formed each on its inside facewith. teeth 5 which bear a staggered relation to each other, the teethon one shank intermeshing with the teeth on the opposed shank when theShanks are forced together in the'position shown in Fig. 2. It will beseen that these intermeshing teeth prevent any relative longitudinalmovement between the two legs of the shackle when the shanks are held inengagement with. each other.

At the -'junction of the shanks 3 with the bowed portions 2, each leg isformed with a convex head 6. Immediately below the convex head each ofthe shanks on their outside face is provided with the radially extendinglug 7. The lower end of each shank on its outside face is also providedwith the radial lug 8, and between the lug -8 and the lug 7 on eachshank are a plurality of radially projecting lugs 9. In the drawingthese lugs 7, 8 and 9 on each shank are disposed diametrically oppositeto each other, and this is the preferable form of the construction. g

The body portion of the padlock comprises a central tube 10, which tubeis longitudinally slotted as at 11at diametrically opposite points, theslots extending nearly to the bottom of the tube. The lower end of thetube is screw threaded as at 12 for engagement with the lowermost disk13 of the series. This disk is formed with the central bore 14 which isscrew threaded on its interior as at 15 to engage with the screw threadsof the tube 10. The upper face of this disk is also radially notched orslotted as at 16, the slots opening at their inner ends at the centralbore and being adapted to engage with the lugs 8 on the lower ends ofthe shanks 3.

Supported upon the lowermost disk and rotatably mounted upon the tubularpintle 10 are a plurality of independently rotatable disks 17. Each ofthese disks is of precisely the same construction and hence adescription of one applies to all of the disks.

. 17 are turned into proper relation to the tubular pintle 10, that thenotches or slots 2O will register with the slots 11 in the tubularpintle and that then the shanks of the shack'le may be inserted into orwithdrawn from the body portion of the lock. The uppermost disk 91 haspractically the same form as the disk previously described and is faston the upper end of the tubular pintle. This disk 21 is attached to thetubular pintle in such manner that it cannot be rotated relatively tothe pintle. This disk 21 forms the head of the tubular pintle and isprovided with radial slots 23 for engagement with the lugs 7 and acentral concave recess 24 for the reception of the con- Vex head 6 onthe shackle.

The periphery of each of the disks 17 is provided with a plurality ofdivision lines or index marks Q5, the spaces between these marks' beingprovided with suitable symbols, as for instance the letters of thealphabet, so as t0 show when the disks have been rotated into properrelation to each other, and the disk 21 is also provided with like indexmarks Q5 with which the marks on the next adjacent disk are adapted toaline when the next adjacent disk has been properly rotated. rl`he indexmarks on the disk or head 9.1 are relatively fixed, the disk or head 21not being rotatable, and the several disks 17 are therefore rotated withreference to the index marks on the disk or head 21.

The operation of the invention is entirely obvious from what has gonebefore. Vhen it is desired to lock the padlock the shackle is closed andthe shanks thereof inserted into the central opening in the tube 10.After the shackle has been inserted, disks 17 surrounding the t-ubularpintle 10 are rotated in any desired manner so that the notches in thedisks are out of alinement with each other and with the lugs 8 and 9.`When so out of alinement it will be obviously impossible to withdrawthe shackle from its engagement with the body and it will also beimpossible by removing the pivot L1 to remove one of the legs of theshackle from its engagement with the body portion, for the reason thatthe legs are locked with each other by the teeth 5 formed upon theirinside faces and cannot be independently moved longitudinally. I'Vhen itis desired to unlock the padlock, the disks 17 are rotated into suchrelation that the notches 20 on each disk are in alinement with the lugs8 and 9. IVhen in proper alinement, the shackle may be withdrawn andopened out. It is to be noted that the lugs 9 are so placed upon theshanks 3 with relation to the disks that the lugs are accommodated inthe recessed portions 18 of the disks 17 when the partsy are in theirlocked position, and that in this position the disks 17 may be freelyrotated around the pintle 10 and the shackle contained therein. It willbe obvious that this lock cannot be picked by rotating the next to thelowerinost disk until it is in alinement with the lugs on the shank andthen pulling up upon the shank, but that it is necessary to get all ofthe disks in proper relation before the shackle can be moved at all.

`While the lowermost disk 13 has screw threaded engagement with thetubular pintle, this lowermost disk 13 cannot be turned upon the tubularpintle so long as the shackle is in place within the padlock, for thereason that the lugs 8 on the extermity of the shackle enter the slots20 of the disk 13 and prevent any rotation of the disk relative to thetubular pintle. IvVhen, however, the shackle is withdrawn so that thelugs 8 escape from the recess 18 in the upper face of the disk 13, thenthe disk 13 may be rotated relative to the tubular pintle and removedtherefrom.

In order to provide for the attachment of a chain to the body of thepadlock I form the lowermost disk 13 with a ring 26 to which the chain27 may be attached, the other end of the chain being attached to thebowed portion of the shackle. The disks are interchangeable and byshifting the disks upon the pintle so as to change their relative orderthe combination may be easily changed. In order to take apart the disksand the pintle the shackle is removed, the disk 13 is held firmly in thehand and the disk 21 rotated, thus rotating the pintle 10 and unscrewingit from its engagement with the lowermost disk. As soon as this is donethe intermediate disks may be removed, care being taken that theirpositions are not shifted as by so doing the combination is changed.

What I claim is :w

1. A permutation padlock having a shackle composed of two coacting partshaving coextensive legs adapted to be placed together to form a shank,the inner faces of the legs being formed with interlocking teeth, saidshank having radial lugs proA jecting therefrom, and a body portionincluding a plurality of rotatable superposed locking disks surroundingthe shank but removable therefrom, each disk having radially extendingnotches, the locking 1 a slotted pintle and a plurality of rotatablelocking disks mounted on the sleeve for 'rotation therearound, saidlocking disks having radially extending notches, the disks beingindependently rotatable to bring the notches into alinement with eachother and with the slot in the central pintle to permit the shackle tobe inserted or withdrawn.

3. A permutation padlock having a shackle composed of two coactingparts, each part comprising a straight portion and a bowed portion, thebowed portions of the shackle being pivoted to each other, the straightportions of thel shackle being provided with outwardly projecting lugsspaced at intervals along the shackle, and a body portion composed of atubular pintle oppositely slotted to receive the lugs on the shackle anda plurality of rotatable disks surrounding the pintle, said disks beingradially notched, the notches extending from the inside of the diskoutward, the disks being independently rotatable to bring the notchesinto alinement with each other and with the slots in the pintle topermit the introduction and removal of the straight portion of theshackle.

4. In a permutation padlock, the combination with a shackle having ashank, of a longitudinally slotted tubular pintle having a fixed head atone end and a rotatable, removable terminal disk at the other end havinga centrally disposed recess in its upper face for the reception of theextremity of the pintle and a radially extending slot leading from saidrecess, a plurality of rotatable locking members disposed between thefixed head and the terminal disk, each having a central passage toreceive and surround said tubular pintle and being provided with meanswhereby they may have a locking engagement with the lugs of the shank,and a radially projecting lug on said shank engaging in the said. radialslot in the terminal disk and preventing the rotation of the terminaldisk on the pintle when the shank of the shackle is inserted throughsaid pintle and into the central recess.

In testimony whereof, I afIix my signature in presence of two witnesses.

CHARLES J. EvANs. [1.. Sg

Witnesses:

WALTER T. MA'rsoN, T. ELMER WILSON.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents. Washington, D. C.

